diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile index 79ed4ac0825..b25570d1d79 100644 --- a/arch/arm/dts/Makefile +++ b/arch/arm/dts/Makefile @@ -1260,7 +1260,9 @@ dtb-$(CONFIG_SOC_K3_AM654) += \ k3-am6528-iot2050-basic-pg2.dtb \ k3-am6548-iot2050-advanced.dtb \ k3-am6548-iot2050-advanced-pg2.dtb \ - k3-am6548-iot2050-advanced-m2.dtb + k3-am6548-iot2050-advanced-m2.dtb \ + k3-am6548-iot2050-advanced-m2-bkey-usb3-overlay.dtbo \ + k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie-overlay.dtbo dtb-$(CONFIG_SOC_K3_J721E) += k3-j721e-common-proc-board.dtb \ k3-j721e-r5-common-proc-board.dtb \ k3-j7200-common-proc-board.dtb \ diff --git a/arch/arm/dts/k3-am65-iot2050-boot-image.dtsi b/arch/arm/dts/k3-am65-iot2050-boot-image.dtsi index a2fc8bbc123..03ccc543293 100644 --- a/arch/arm/dts/k3-am65-iot2050-boot-image.dtsi +++ b/arch/arm/dts/k3-am65-iot2050-boot-image.dtsi @@ -61,6 +61,36 @@ }; }; +#ifdef CONFIG_TARGET_IOT2050_A53_PG2 + bkey-usb3-overlay { + description = "M.2-bkey-usb3-overlay"; + type = "blob"; + load = <0x82100000>; + arch = "arm64"; + compression = "none"; + blob-ext { + filename = "k3-am6548-iot2050-advanced-m2-bkey-usb3-overlay.dtbo"; + }; + hash { + algo = "sha256"; + }; + }; + + bkey-ekey-pcie-overlay { + description = "M.2-bkey-ekey-pcie-overlay"; + type = "blob"; + load = <0x82110000>; + arch = "arm64"; + compression = "none"; + blob-ext { + filename = "k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie-overlay.dtbo"; + }; + hash { + algo = "sha256"; + }; + }; +#endif + #ifdef CONFIG_WDT_K3_RTI_FW_FILE k3-rti-wdt-firmware { type = "firmware"; @@ -84,9 +114,15 @@ description = "NAME"; firmware = "u-boot"; fdt = "fdt-SEQ"; -#ifdef CONFIG_WDT_K3_RTI_FW_FILE - loadables = "k3-rti-wdt-firmware"; + loadables = +#ifdef CONFIG_TARGET_IOT2050_A53_PG2 + "bkey-usb3-overlay", + "bkey-ekey-pcie-overlay", #endif +#ifdef CONFIG_WDT_K3_RTI_FW_FILE + "k3-rti-wdt-firmware", +#endif + <>; signature { sign-images = "firmware", "fdt", "loadables"; }; diff --git a/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie-overlay.dts b/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie-overlay.dts new file mode 100644 index 00000000000..c9e736098f9 --- /dev/null +++ b/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie-overlay.dts @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IOT2050 M.2 variant, overlay for B-key PCIE0_LANE0 + E-key PCIE1_LANE0 + * Copyright (c) Siemens AG, 2022 + * + * Authors: + * Chao Zeng + * Jan Kiszka + */ + +/dts-v1/; +/plugin/; + +#include +#include + +&pcie0_rc { + num-lanes = <1>; + phys = <&serdes0 PHY_TYPE_PCIE 1>; + phy-names = "pcie-phy0"; + reset-gpios = <&main_gpio1 15 GPIO_ACTIVE_HIGH>; + status = "okay"; +}; + +&pcie1_rc { + status = "okay"; +}; diff --git a/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-usb3-overlay.dts b/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-usb3-overlay.dts new file mode 100644 index 00000000000..72fc011bd54 --- /dev/null +++ b/arch/arm/dts/k3-am6548-iot2050-advanced-m2-bkey-usb3-overlay.dts @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IOT2050 M.2 variant, overlay for B-key USB3.0 + E-key PCIE1_LANE0 + * Copyright (c) Siemens AG, 2022 + * + * Authors: + * Chao Zeng + * Jan Kiszka + */ + +/dts-v1/; +/plugin/; + +#include +#include + +&serdes0 { + assigned-clock-parents = <&k3_clks 153 7>, <&k3_clks 153 4>; +}; + +&pcie0_rc { + status = "disabled"; +}; + +&pcie1_rc { + pinctrl-names = "default"; + pinctrl-0 = <&minipcie_pins_default>; + + num-lanes = <1>; + phys = <&serdes1 PHY_TYPE_PCIE 0>; + phy-names = "pcie-phy0"; + reset-gpios = <&wkup_gpio0 27 GPIO_ACTIVE_HIGH>; + status = "okay"; +}; + +&dwc3_0 { + assigned-clock-parents = <&k3_clks 151 4>, /* set REF_CLK to 20MHz i.e. PER0_PLL/48 */ + <&k3_clks 151 8>; /* set PIPE3_TXB_CLK to WIZ8B2M4VSB */ + phys = <&serdes0 PHY_TYPE_USB3 0>; + phy-names = "usb3-phy"; +}; + +&usb0 { + maximum-speed = "super-speed"; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; +}; diff --git a/board/siemens/iot2050/board.c b/board/siemens/iot2050/board.c index 2735ae3fb74..df705b7c971 100644 --- a/board/siemens/iot2050/board.c +++ b/board/siemens/iot2050/board.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ /* * Board specific initialization for IOT2050 - * Copyright (c) Siemens AG, 2018-2021 + * Copyright (c) Siemens AG, 2018-2022 * * Authors: * Le Jin @@ -11,9 +11,11 @@ #include #include #include +#include #include #include #include +#include #include #include #include @@ -47,6 +49,114 @@ struct iot2050_info { DECLARE_GLOBAL_DATA_PTR; +struct gpio_config { + const char *gpio_name; + const char *label; +}; + +enum m2_connector_mode { + BKEY_PCIEX2 = 0, + BKEY_PCIE_EKEY_PCIE, + BKEY_USB30_EKEY_PCIE, + CONNECTOR_MODE_INVALID +}; + +struct m2_config_pins { + int config[4]; +}; + +struct serdes_mux_control { + int ctrl_usb30_pcie0_lane0; + int ctrl_pcie1_pcie0; + int ctrl_usb30_pcie0_lane1; +}; + +struct m2_config_table { + struct m2_config_pins config_pins; + enum m2_connector_mode mode; +}; + +static const struct gpio_config serdes_mux_ctl_pin_info[] = { + {"gpio@600000_88", "CTRL_USB30_PCIE0_LANE0"}, + {"gpio@600000_82", "CTRL_PCIE1_PCIE0"}, + {"gpio@600000_89", "CTRL_USB30_PCIE0_LANE1"}, +}; + +static const struct gpio_config m2_bkey_cfg_pin_info[] = { + {"gpio@601000_18", "KEY_CONFIG_0"}, + {"gpio@601000_19", "KEY_CONFIG_1"}, + {"gpio@601000_88", "KEY_CONFIG_2"}, + {"gpio@601000_89", "KEY_CONFIG_3"}, +}; + +static const struct m2_config_table m2_config_table[] = { + {{{0, 1, 0, 0}}, BKEY_PCIEX2}, + {{{0, 0, 1, 0}}, BKEY_PCIE_EKEY_PCIE}, + {{{0, 1, 1, 0}}, BKEY_PCIE_EKEY_PCIE}, + {{{1, 0, 0, 1}}, BKEY_PCIE_EKEY_PCIE}, + {{{1, 1, 0, 1}}, BKEY_PCIE_EKEY_PCIE}, + {{{0, 0, 0, 1}}, BKEY_USB30_EKEY_PCIE}, + {{{0, 1, 0, 1}}, BKEY_USB30_EKEY_PCIE}, + {{{0, 0, 1, 1}}, BKEY_USB30_EKEY_PCIE}, + {{{0, 1, 1, 1}}, BKEY_USB30_EKEY_PCIE}, + {{{1, 0, 1, 1}}, BKEY_USB30_EKEY_PCIE}, +}; + +static const struct serdes_mux_control serdes_mux_ctrl[] = { + [BKEY_PCIEX2] = {0, 0, 1}, + [BKEY_PCIE_EKEY_PCIE] = {0, 1, 0}, + [BKEY_USB30_EKEY_PCIE] = {1, 1, 0}, +}; + +static const char *m2_connector_mode_name[] = { + [BKEY_PCIEX2] = "PCIe x2 (key B)", + [BKEY_PCIE_EKEY_PCIE] = "PCIe (key B) / PCIe (key E)", + [BKEY_USB30_EKEY_PCIE] = "USB 3.0 (key B) / PCIe (key E)", +}; + +static enum m2_connector_mode connector_mode; + +#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) +static void *connector_overlay; +static u32 connector_overlay_size; +#endif + +static int get_pinvalue(const char *gpio_name, const char *label) +{ + struct gpio_desc gpio; + + if (dm_gpio_lookup_name(gpio_name, &gpio) < 0 || + dm_gpio_request(&gpio, label) < 0 || + dm_gpio_set_dir_flags(&gpio, GPIOD_IS_IN) < 0) { + pr_err("Cannot get pin %s for M.2 configuration\n", gpio_name); + return 0; + } + + return dm_gpio_get_value(&gpio); +} + +static void set_pinvalue(const char *gpio_name, const char *label, int value) +{ + struct gpio_desc gpio; + + if (dm_gpio_lookup_name(gpio_name, &gpio) < 0 || + dm_gpio_request(&gpio, label) < 0 || + dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT) < 0) { + pr_err("Cannot set pin %s for M.2 configuration\n", gpio_name); + return; + } + dm_gpio_set_value(&gpio, value); +} + +static bool board_is_m2(void) +{ + struct iot2050_info *info = IOT2050_INFO_DATA; + + return IS_ENABLED(CONFIG_TARGET_IOT2050_A53_PG2) && + info->magic == IOT2050_INFO_MAGIC && + strcmp((char *)info->name, "IOT2050-ADVANCED-M2") == 0; +} + static bool board_is_advanced(void) { struct iot2050_info *info = IOT2050_INFO_DATA; @@ -103,6 +213,8 @@ void set_board_info_env(void) if (board_is_advanced()) { if (IS_ENABLED(CONFIG_TARGET_IOT2050_A53_PG1)) fdtfile = "ti/k3-am6548-iot2050-advanced.dtb"; + else if(board_is_m2()) + fdtfile = "ti/k3-am6548-iot2050-advanced-m2.dtb"; else fdtfile = "ti/k3-am6548-iot2050-advanced-pg2.dtb"; } else { @@ -118,6 +230,101 @@ void set_board_info_env(void) env_save(); } +static void m2_overlay_prepare(void) +{ +#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) + const char *overlay_path; + void *overlay; + u64 loadaddr; + ofnode node; + int ret; + + if (connector_mode == BKEY_PCIEX2) + return; + + if (connector_mode == BKEY_PCIE_EKEY_PCIE) + overlay_path = "/fit-images/bkey-ekey-pcie-overlay"; + else + overlay_path = "/fit-images/bkey-usb3-overlay"; + + node = ofnode_path(overlay_path); + if (!ofnode_valid(node)) + goto fit_error; + + ret = ofnode_read_u64(node, "load", &loadaddr); + if (ret) + goto fit_error; + + ret = ofnode_read_u32(node, "size", &connector_overlay_size); + if (ret) + goto fit_error; + + overlay = map_sysmem(loadaddr, connector_overlay_size); + + connector_overlay = malloc(connector_overlay_size); + if (!connector_overlay) + goto fit_error; + + memcpy(connector_overlay, overlay, connector_overlay_size); + return; + +fit_error: + pr_err("M.2 device tree overlay %s not available,\n", overlay_path); +#endif +} + +static void m2_connector_setup(void) +{ + ulong m2_manual_config = env_get_ulong("m2_manual_config", 10, + CONNECTOR_MODE_INVALID); + const char *mode_info = ""; + struct m2_config_pins config_pins; + unsigned int n; + + /* enable M.2 connector power */ + set_pinvalue("gpio@601000_17", "P3V3_M2_EN", 1); + udelay(4 * 100); + + if (m2_manual_config < CONNECTOR_MODE_INVALID) { + mode_info = " [manual mode]"; + connector_mode = m2_manual_config; + } else { /* auto detection */ + for (n = 0; n < ARRAY_SIZE(config_pins.config); n++) + config_pins.config[n] = + get_pinvalue(m2_bkey_cfg_pin_info[n].gpio_name, + m2_bkey_cfg_pin_info[n].label); + connector_mode = CONNECTOR_MODE_INVALID; + for (n = 0; n < ARRAY_SIZE(m2_config_table); n++) { + if (!memcmp(config_pins.config, + m2_config_table[n].config_pins.config, + sizeof(config_pins.config))) { + connector_mode = m2_config_table[n].mode; + break; + } + } + if (connector_mode == CONNECTOR_MODE_INVALID) { + mode_info = " [fallback, card unknown/unsupported]"; + connector_mode = BKEY_USB30_EKEY_PCIE; + } + } + + printf("M.2: %s%s\n", m2_connector_mode_name[connector_mode], + mode_info); + + /* configure serdes mux */ + set_pinvalue(serdes_mux_ctl_pin_info[0].gpio_name, + serdes_mux_ctl_pin_info[0].label, + serdes_mux_ctrl[connector_mode].ctrl_usb30_pcie0_lane0); + set_pinvalue(serdes_mux_ctl_pin_info[1].gpio_name, + serdes_mux_ctl_pin_info[1].label, + serdes_mux_ctrl[connector_mode].ctrl_pcie1_pcie0); + set_pinvalue(serdes_mux_ctl_pin_info[2].gpio_name, + serdes_mux_ctl_pin_info[2].label, + serdes_mux_ctrl[connector_mode].ctrl_usb30_pcie0_lane1); + + m2_overlay_prepare(); +} + int board_init(void) { return 0; @@ -215,6 +422,9 @@ int board_late_init(void) /* change CTRL_MMR register to let serdes0 not output USB3.0 signals. */ writel(0x3, SERDES0_LANE_SELECT); + if (board_is_m2()) + m2_connector_setup(); + set_board_info_env(); /* remove the eMMC if requested via button */ @@ -226,6 +436,50 @@ int board_late_init(void) } #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) +static void m2_fdt_fixup(void *blob) +{ + void *overlay_copy = NULL; + void *fdt_copy = NULL; + u32 fdt_size; + int err; + + if (!connector_overlay) + return; + + /* + * We need to work with temporary copies here because fdt_overlay_apply + * is destructive to the overlay and also to the target blob, even if + * application fails. + */ + fdt_size = fdt_totalsize(blob); + fdt_copy = malloc(fdt_size); + if (!fdt_copy) + goto fixup_error; + + memcpy(fdt_copy, blob, fdt_size); + + overlay_copy = malloc(connector_overlay_size); + if (!overlay_copy) + goto fixup_error; + + memcpy(overlay_copy, connector_overlay, connector_overlay_size); + + err = fdt_overlay_apply_verbose(fdt_copy, overlay_copy); + if (err) + goto fixup_error; + + memcpy(blob, fdt_copy, fdt_size); + +cleanup: + free(fdt_copy); + free(overlay_copy); + return; + +fixup_error: + pr_err("Could not apply M.2 device tree overlay\n"); + goto cleanup; +} + int ft_board_setup(void *blob, struct bd_info *bd) { int ret; @@ -237,6 +491,9 @@ int ft_board_setup(void *blob, struct bd_info *bd) if (ret) pr_err("%s: fixing up msmc ram failed %d\n", __func__, ret); + if (board_is_m2()) + m2_fdt_fixup(blob); + return ret; } #endif diff --git a/doc/board/siemens/iot2050.rst b/doc/board/siemens/iot2050.rst index 442d2cac216..074d6aa15af 100644 --- a/doc/board/siemens/iot2050.rst +++ b/doc/board/siemens/iot2050.rst @@ -145,3 +145,21 @@ Flash signed flash.bin The signing has happen in-place in flash.bin, thus the flashing procedure described above. + +M.2 slot configuration +---------------------- + +The M.2 variant of the IOT2050 comes with one B-keyed and one E-keyed slot. +These are configured by U-Boot depending on the detected usage (auto +configuration). The device tree loaded later on for the OS will be fixed up +by U-Boot according to this configuration. + +For the case auto configuration does not work reliably, it is possible to set +the U-Boot environment variable "m2_manual_config" to select the mode manually: + +"0" - B-key: PCIe x2, USB 2.0 + E-key: USB 2.0 +"1" - B-key: PCIe, USB 2.0 + E-key: PCIe, USB 2.0 +"2" - B-key: USB 3.0, + E-key: PCIe, USB 2.0 diff --git a/include/configs/iot2050.h b/include/configs/iot2050.h index 217719472e5..82174b8678b 100644 --- a/include/configs/iot2050.h +++ b/include/configs/iot2050.h @@ -44,6 +44,7 @@ #define CFG_ENV_FLAGS_LIST_STATIC \ "board_uuid:sw,board_name:sw,board_serial:sw,board_a5e:sw," \ "mlfb:sw,fw_version:sw,seboot_version:sw," \ + "m2_manuel_config:sw," \ "eth1addr:mw,eth2addr:mw,watchdog_timeout_ms:dw,boot_targets:sw" #endif